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Finding the Fourth Proportional to 139,649.75, 192,349.53 and 107,322.51

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Solution

The fourth proportional to 139,649.75, 192,349.53 and 107,322.51 is: 147,822.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,649.75 : 192,349.53 = 107,322.51 : x
  2. Step 2: Convert to fraction form
    139,649.75/192,349.53 = 107,322.51/x
  3. Step 3: Cross multiply
    139,649.75x = 192,349.53 × 107,322.51
  4. Step 4: Simplify right side
    139,649.75x = 20,643,434,356.92
  5. Step 5: Solve for x
    x = 20,643,434,356.92/139,649.75
  6. Step 6: Final answer
    x = 147,822.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.